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HARDCLOCK(9) Kernel Developer's Manual HARDCLOCK(9)

hardclockreal-time timer

void
hardclock(struct clockframe *frame);

The () function is called hz(9) times per second. It implements the real-time system clock. The argument frame is an opaque, machine-dependent structure that encapsulates the previous machine state.

The () performs different tasks such as:

adjtime(2), ntp_adjtime(2), signal(7), ntpd(8), callout(9), hz(9)

March 25, 2010 NetBSD-9.2